单频纳秒脉冲全光纤激光器实现300W平均功率输出

摘要

搭建了一台主振荡功率放大(MOPA)结构的单频脉冲全光纤激光器.通过对线宽为20kHz的连续单频激光器进行强度调制,获得了重复频率10MHz、脉宽约8ns、平均功率约0.5mW的单频脉冲种子激光.采用多级掺镱光纤放大器对9脉冲种子激光进行级联放大,获得了平均功率300.8W的高功率激光输出.目前,激光器输出功率仅受限于泵浦功率,有望通过增加泵浦功率进一步提高输出功率.%A master oscillator power amplifier(MOPA) structured pulsed Yb fiber laser is set up. The single-frequency pulsed seed, with a repetition rate of 10 MHz, a pulse duration of about 8 ns, and an average power of 0. 5 mW, is obtained by externally modulating a continuous wave laser with line width of 20 kHz. The pulsed seed is amplified to 300. 8 W of average power with four Yb-doped fiber amplifiers. Further power-scaling of this MOPA structure can be realized since our experiment is only pump-power limited.